137571-81-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 137571-81-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,5,7 and 1 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 137571-81:
(8*1)+(7*3)+(6*7)+(5*5)+(4*7)+(3*1)+(2*8)+(1*1)=144
144 % 10 = 4
So 137571-81-4 is a valid CAS Registry Number.